Erik Andersen | ccc7488 | 2000-01-27 02:40:21 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Mini init implementation for busybox |
| 4 | * |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 5 | * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>. |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 6 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 7 | * Adjusted by so many folks, it's impossible to keep track. |
| 8 | * |
Rob Landley | 2edf526 | 2006-01-22 02:41:51 +0000 | [diff] [blame] | 9 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 10 | */ |
| 11 | |
Denis Vlasenko | b6adbf1 | 2007-05-26 19:00:18 +0000 | [diff] [blame] | 12 | #include "libbb.h" |
Eric Andersen | b186d98 | 1999-12-03 09:19:54 +0000 | [diff] [blame] | 13 | #include <paths.h> |
Denis Vlasenko | 9a7d38f | 2007-05-31 22:42:12 +0000 | [diff] [blame] | 14 | //#include <signal.h> |
| 15 | //#include <sys/ioctl.h> |
| 16 | //#include <sys/wait.h> |
Eric Andersen | 85e5e72 | 2003-07-22 08:56:55 +0000 | [diff] [blame] | 17 | #include <sys/reboot.h> |
Eric Andersen | b01ed65 | 2003-06-27 17:08:15 +0000 | [diff] [blame] | 18 | |
Denis Vlasenko | ccd412d | 2007-03-05 19:55:30 +0000 | [diff] [blame] | 19 | #if ENABLE_FEATURE_INIT_SYSLOG |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 20 | # include <sys/syslog.h> |
| 21 | #endif |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 22 | |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 23 | #define INIT_BUFFS_SIZE 256 |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 24 | #define CONSOLE_NAME_SIZE 32 |
| 25 | #define MAXENV 16 /* Number of env. vars */ |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 26 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 27 | #if ENABLE_FEATURE_INIT_COREDUMPS |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 28 | /* |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 29 | * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 30 | * before processes are spawned to set core file size as unlimited. |
| 31 | * This is for debugging only. Don't use this is production, unless |
| 32 | * you want core dumps lying about.... |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 33 | */ |
| 34 | #define CORE_ENABLE_FLAG_FILE "/.init_enable_core" |
| 35 | #include <sys/resource.h> |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 36 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 37 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 38 | #define INITTAB "/etc/inittab" /* inittab file location */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 39 | #ifndef INIT_SCRIPT |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 40 | #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 41 | #endif |
Erik Andersen | 9c88cac | 1999-12-30 09:25:17 +0000 | [diff] [blame] | 42 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 43 | /* Allowed init action types */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 44 | #define SYSINIT 0x001 |
| 45 | #define RESPAWN 0x002 |
| 46 | #define ASKFIRST 0x004 |
| 47 | #define WAIT 0x008 |
| 48 | #define ONCE 0x010 |
| 49 | #define CTRLALTDEL 0x020 |
| 50 | #define SHUTDOWN 0x040 |
| 51 | #define RESTART 0x080 |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 52 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 53 | /* A mapping between "inittab" action name strings and action type codes. */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 54 | struct init_action_type { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 55 | const char *name; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 56 | int action; |
| 57 | }; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 58 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 59 | static const struct init_action_type actions[] = { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 60 | {"sysinit", SYSINIT}, |
| 61 | {"respawn", RESPAWN}, |
| 62 | {"askfirst", ASKFIRST}, |
| 63 | {"wait", WAIT}, |
| 64 | {"once", ONCE}, |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 65 | {"ctrlaltdel", CTRLALTDEL}, |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 66 | {"shutdown", SHUTDOWN}, |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 67 | {"restart", RESTART}, |
Pavel Roskin | 9027bcf | 2000-07-14 15:44:25 +0000 | [diff] [blame] | 68 | {0, 0} |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 69 | }; |
| 70 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 71 | /* Set up a linked list of init_actions, to be read from inittab */ |
| 72 | struct init_action { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 73 | struct init_action *next; |
| 74 | int action; |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 75 | pid_t pid; |
| 76 | char command[INIT_BUFFS_SIZE]; |
| 77 | char terminal[CONSOLE_NAME_SIZE]; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 78 | }; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 79 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 80 | /* Static variables */ |
| 81 | static struct init_action *init_action_list = NULL; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 82 | |
Denis Vlasenko | ccd412d | 2007-03-05 19:55:30 +0000 | [diff] [blame] | 83 | #if !ENABLE_FEATURE_INIT_SYSLOG |
Denis Vlasenko | 4c97863 | 2007-02-03 03:31:13 +0000 | [diff] [blame] | 84 | static const char *log_console = VC_5; |
Eric Andersen | e707806 | 2002-07-29 08:00:16 +0000 | [diff] [blame] | 85 | #endif |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 86 | #if !ENABLE_DEBUG_INIT |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 87 | static sig_atomic_t got_cont = 0; |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 88 | #endif |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 89 | |
| 90 | enum { |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 91 | L_LOG = 0x1, |
| 92 | L_CONSOLE = 0x2, |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 93 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 94 | #if ENABLE_FEATURE_EXTRA_QUIET |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 95 | MAYBE_CONSOLE = 0x0, |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 96 | #else |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 97 | MAYBE_CONSOLE = L_CONSOLE, |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 98 | #endif |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 99 | |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 100 | #ifndef RB_HALT_SYSTEM |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 101 | RB_HALT_SYSTEM = 0xcdef0123, /* FIXME: this overflows enum */ |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 102 | RB_ENABLE_CAD = 0x89abcdef, |
| 103 | RB_DISABLE_CAD = 0, |
| 104 | RB_POWER_OFF = 0x4321fedc, |
| 105 | RB_AUTOBOOT = 0x01234567, |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 106 | #endif |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 107 | }; |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 108 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 109 | static const char * const environment[] = { |
| 110 | "HOME=/", |
Denis Vlasenko | f5f75c5 | 2007-06-12 22:35:19 +0000 | [diff] [blame] | 111 | bb_PATH_root_path, |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 112 | "SHELL=/bin/sh", |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 113 | "USER=root", |
| 114 | NULL |
| 115 | }; |
| 116 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 117 | /* Function prototypes */ |
| 118 | static void delete_init_action(struct init_action *a); |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 119 | static int waitfor(const struct init_action *a, pid_t pid); |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 120 | #if !ENABLE_DEBUG_INIT |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 121 | static void shutdown_signal(int sig); |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 122 | #endif |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 123 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 124 | #if !ENABLE_DEBUG_INIT |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 125 | static void loop_forever(void) |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 126 | { |
| 127 | while (1) |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 128 | sleep(1); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 129 | } |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 130 | #endif |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 131 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 132 | /* Print a message to the specified device. |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 133 | * Device may be bitwise-or'd from L_LOG | L_CONSOLE */ |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 134 | #if ENABLE_DEBUG_INIT |
| 135 | #define messageD message |
| 136 | #else |
Denis Vlasenko | bf0a201 | 2006-12-26 10:42:51 +0000 | [diff] [blame] | 137 | #define messageD(...) do {} while (0) |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 138 | #endif |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 139 | static void message(int device, const char *fmt, ...) |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 140 | __attribute__ ((format(printf, 2, 3))); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 141 | static void message(int device, const char *fmt, ...) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 142 | { |
Denis Vlasenko | ccd412d | 2007-03-05 19:55:30 +0000 | [diff] [blame] | 143 | #if !ENABLE_FEATURE_INIT_SYSLOG |
Eric Andersen | 2223701 | 2003-01-23 07:08:26 +0000 | [diff] [blame] | 144 | static int log_fd = -1; |
| 145 | #endif |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 146 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 147 | va_list arguments; |
| 148 | int l; |
| 149 | char msg[128]; |
| 150 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 151 | msg[0] = '\r'; |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 152 | va_start(arguments, fmt); |
| 153 | vsnprintf(msg + 1, sizeof(msg) - 2, fmt, arguments); |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 154 | va_end(arguments); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 155 | msg[sizeof(msg) - 2] = '\0'; |
| 156 | l = strlen(msg); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 157 | |
Denis Vlasenko | ccd412d | 2007-03-05 19:55:30 +0000 | [diff] [blame] | 158 | #if ENABLE_FEATURE_INIT_SYSLOG |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 159 | /* Log the message to syslogd */ |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 160 | if (device & L_LOG) { |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 161 | /* don't out "\r" */ |
Denis Vlasenko | 8f8f268 | 2006-10-03 21:00:43 +0000 | [diff] [blame] | 162 | openlog(applet_name, 0, LOG_DAEMON); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 163 | syslog(LOG_INFO, "init: %s", msg + 1); |
Eric Andersen | 36adca8 | 2004-06-22 10:07:17 +0000 | [diff] [blame] | 164 | closelog(); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 165 | } |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 166 | msg[l++] = '\n'; |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 167 | msg[l] = '\0'; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 168 | #else |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 169 | msg[l++] = '\n'; |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 170 | msg[l] = '\0'; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 171 | /* Take full control of the log tty, and never close it. |
| 172 | * It's mine, all mine! Muhahahaha! */ |
| 173 | if (log_fd < 0) { |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 174 | if (!log_console) { |
| 175 | log_fd = 2; |
Eric Andersen | 6a97990 | 2002-09-30 20:08:53 +0000 | [diff] [blame] | 176 | } else { |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 177 | log_fd = device_open(log_console, O_WRONLY | O_NONBLOCK | O_NOCTTY); |
| 178 | if (log_fd < 0) { |
| 179 | bb_error_msg("can't log to %s", log_console); |
| 180 | device = L_CONSOLE; |
| 181 | } else { |
| 182 | fcntl(log_fd, F_SETFD, FD_CLOEXEC); |
| 183 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 184 | } |
| 185 | } |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 186 | if (device & L_LOG) { |
Rob Landley | 5343747 | 2006-07-16 08:14:35 +0000 | [diff] [blame] | 187 | full_write(log_fd, msg, l); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 188 | if (log_fd == 2) |
| 189 | return; /* don't print dup messages */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 190 | } |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 191 | #endif |
| 192 | |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 193 | if (device & L_CONSOLE) { |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 194 | /* Send console messages to console so people will see them. */ |
| 195 | full_write(2, msg, l); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 196 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 197 | } |
| 198 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 199 | /* Set terminal settings to reasonable defaults */ |
Denis Vlasenko | d238a47 | 2007-03-05 19:22:04 +0000 | [diff] [blame] | 200 | static void set_sane_term(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 201 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 202 | struct termios tty; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 203 | |
Bernhard Reutner-Fischer | 49e60b9 | 2006-05-29 12:57:52 +0000 | [diff] [blame] | 204 | tcgetattr(STDIN_FILENO, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 205 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 206 | /* set control chars */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 207 | tty.c_cc[VINTR] = 3; /* C-c */ |
| 208 | tty.c_cc[VQUIT] = 28; /* C-\ */ |
| 209 | tty.c_cc[VERASE] = 127; /* C-? */ |
| 210 | tty.c_cc[VKILL] = 21; /* C-u */ |
| 211 | tty.c_cc[VEOF] = 4; /* C-d */ |
Eric Andersen | 3849f9b | 2000-07-10 19:56:47 +0000 | [diff] [blame] | 212 | tty.c_cc[VSTART] = 17; /* C-q */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 213 | tty.c_cc[VSTOP] = 19; /* C-s */ |
| 214 | tty.c_cc[VSUSP] = 26; /* C-z */ |
Eric Andersen | 02bc25b | 2000-07-06 21:29:32 +0000 | [diff] [blame] | 215 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 216 | /* use line dicipline 0 */ |
| 217 | tty.c_line = 0; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 218 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 219 | /* Make it be sane */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 220 | tty.c_cflag &= CBAUD | CBAUDEX | CSIZE | CSTOPB | PARENB | PARODD; |
| 221 | tty.c_cflag |= CREAD | HUPCL | CLOCAL; |
Eric Andersen | d886292 | 2001-04-23 15:14:11 +0000 | [diff] [blame] | 222 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 223 | /* input modes */ |
| 224 | tty.c_iflag = ICRNL | IXON | IXOFF; |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 225 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 226 | /* output modes */ |
| 227 | tty.c_oflag = OPOST | ONLCR; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 228 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 229 | /* local modes */ |
| 230 | tty.c_lflag = |
| 231 | ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 232 | |
Bernhard Reutner-Fischer | 49e60b9 | 2006-05-29 12:57:52 +0000 | [diff] [blame] | 233 | tcsetattr(STDIN_FILENO, TCSANOW, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 234 | } |
| 235 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 236 | /* From <linux/serial.h> */ |
| 237 | struct serial_struct { |
| 238 | int type; |
| 239 | int line; |
| 240 | unsigned int port; |
| 241 | int irq; |
| 242 | int flags; |
| 243 | int xmit_fifo_size; |
| 244 | int custom_divisor; |
| 245 | int baud_base; |
| 246 | unsigned short close_delay; |
| 247 | char io_type; |
| 248 | char reserved_char[1]; |
| 249 | int hub6; |
| 250 | unsigned short closing_wait; /* time to wait before closing */ |
| 251 | unsigned short closing_wait2; /* no longer used... */ |
| 252 | unsigned char *iomem_base; |
| 253 | unsigned short iomem_reg_shift; |
| 254 | unsigned int port_high; |
| 255 | unsigned long iomap_base; /* cookie passed into ioremap */ |
| 256 | int reserved[1]; |
| 257 | /* Paranoia (imagine 64bit kernel overwriting 32bit userspace stack) */ |
| 258 | uint32_t bbox_reserved[16]; |
| 259 | }; |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 260 | static void console_init(void) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 261 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 262 | struct serial_struct sr; |
| 263 | char *s; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 264 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 265 | s = getenv("CONSOLE"); |
| 266 | if (!s) s = getenv("console"); |
| 267 | if (s) { |
| 268 | int fd = open(s, O_RDWR | O_NONBLOCK | O_NOCTTY); |
| 269 | if (fd >= 0) { |
| 270 | dup2(fd, 0); |
| 271 | dup2(fd, 1); |
| 272 | dup2(fd, 2); |
| 273 | while (fd > 2) close(fd--); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 274 | } |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 275 | messageD(L_LOG, "console='%s'", s); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 276 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 277 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 278 | s = getenv("TERM"); |
| 279 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
| 280 | /* Force the TERM setting to vt102 for serial console -- |
| 281 | * if TERM is set to linux (the default) */ |
| 282 | if (!s || strcmp(s, "linux") == 0) |
| 283 | putenv((char*)"TERM=vt102"); |
Denis Vlasenko | ccd412d | 2007-03-05 19:55:30 +0000 | [diff] [blame] | 284 | #if !ENABLE_FEATURE_INIT_SYSLOG |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 285 | log_console = NULL; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 286 | #endif |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 287 | } else if (!s) |
| 288 | putenv((char*)"TERM=linux"); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 289 | } |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 290 | |
Denis Vlasenko | 06c0a71 | 2007-01-29 22:51:44 +0000 | [diff] [blame] | 291 | static void fixup_argv(int argc, char **argv, const char *new_argv0) |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 292 | { |
| 293 | int len; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 294 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 295 | /* Fix up argv[0] to be certain we claim to be init */ |
| 296 | len = strlen(argv[0]); |
Denis Vlasenko | 06c0a71 | 2007-01-29 22:51:44 +0000 | [diff] [blame] | 297 | strncpy(argv[0], new_argv0, len); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 298 | |
| 299 | /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */ |
| 300 | len = 1; |
| 301 | while (argc > len) { |
| 302 | memset(argv[len], 0, strlen(argv[len])); |
| 303 | len++; |
| 304 | } |
| 305 | } |
| 306 | |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 307 | /* Open the new terminal device */ |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 308 | static void open_stdio_to_tty(const char* tty_name, int fail) |
| 309 | { |
| 310 | /* empty tty_name means "use init's tty", else... */ |
| 311 | if (tty_name[0]) { |
Denis Vlasenko | d238a47 | 2007-03-05 19:22:04 +0000 | [diff] [blame] | 312 | int fd = device_open(tty_name, O_RDWR); |
| 313 | if (fd < 0) { |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 314 | message(L_LOG | L_CONSOLE, "Can't open %s: %s", |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 315 | tty_name, strerror(errno)); |
| 316 | if (fail) |
| 317 | _exit(1); |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 318 | #if !ENABLE_DEBUG_INIT |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 319 | shutdown_signal(SIGUSR1); |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 320 | #else |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 321 | _exit(2); |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 322 | #endif |
Denis Vlasenko | d238a47 | 2007-03-05 19:22:04 +0000 | [diff] [blame] | 323 | } else { |
| 324 | dup2(fd, 0); |
| 325 | dup2(fd, 1); |
| 326 | dup2(fd, 2); |
| 327 | if (fd > 2) close(fd); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 328 | } |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 329 | } |
Denis Vlasenko | d238a47 | 2007-03-05 19:22:04 +0000 | [diff] [blame] | 330 | set_sane_term(); |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 331 | } |
| 332 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 333 | static pid_t run(const struct init_action *a) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 334 | { |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 335 | int i; |
Mike Frysinger | 10427ab | 2005-07-06 05:00:48 +0000 | [diff] [blame] | 336 | pid_t pid; |
Denis Vlasenko | 06c0a71 | 2007-01-29 22:51:44 +0000 | [diff] [blame] | 337 | char *s, *tmpCmd, *cmdpath; |
| 338 | char *cmd[INIT_BUFFS_SIZE]; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 339 | char buf[INIT_BUFFS_SIZE + 6]; /* INIT_BUFFS_SIZE+strlen("exec ")+1 */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 340 | sigset_t nmask, omask; |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 341 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 342 | /* Block sigchild while forking. */ |
| 343 | sigemptyset(&nmask); |
| 344 | sigaddset(&nmask, SIGCHLD); |
| 345 | sigprocmask(SIG_BLOCK, &nmask, &omask); |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 346 | pid = fork(); |
| 347 | sigprocmask(SIG_SETMASK, &omask, NULL); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 348 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 349 | if (pid) |
| 350 | return pid; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 351 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 352 | /* Reset signal handlers that were set by the parent process */ |
| 353 | signal(SIGUSR1, SIG_DFL); |
| 354 | signal(SIGUSR2, SIG_DFL); |
| 355 | signal(SIGINT, SIG_DFL); |
| 356 | signal(SIGTERM, SIG_DFL); |
| 357 | signal(SIGHUP, SIG_DFL); |
| 358 | signal(SIGQUIT, SIG_DFL); |
| 359 | signal(SIGCONT, SIG_DFL); |
| 360 | signal(SIGSTOP, SIG_DFL); |
| 361 | signal(SIGTSTP, SIG_DFL); |
Eric Andersen | 2f6c04f | 1999-11-01 23:59:44 +0000 | [diff] [blame] | 362 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 363 | /* Create a new session and make ourself the process |
| 364 | * group leader */ |
| 365 | setsid(); |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 366 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 367 | /* Open the new terminal device */ |
| 368 | open_stdio_to_tty(a->terminal, 1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 369 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 370 | /* If the init Action requires us to wait, then force the |
| 371 | * supplied terminal to be the controlling tty. */ |
| 372 | if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 373 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 374 | /* Now fork off another process to just hang around */ |
| 375 | if ((pid = fork()) < 0) { |
| 376 | message(L_LOG | L_CONSOLE, "Can't fork"); |
| 377 | _exit(1); |
| 378 | } |
| 379 | |
| 380 | if (pid > 0) { |
| 381 | |
| 382 | /* We are the parent -- wait till the child is done */ |
| 383 | signal(SIGINT, SIG_IGN); |
| 384 | signal(SIGTSTP, SIG_IGN); |
| 385 | signal(SIGQUIT, SIG_IGN); |
| 386 | signal(SIGCHLD, SIG_DFL); |
| 387 | |
| 388 | waitfor(NULL, pid); |
| 389 | /* See if stealing the controlling tty back is necessary */ |
| 390 | if (tcgetpgrp(0) != getpid()) |
| 391 | _exit(0); |
| 392 | |
| 393 | /* Use a temporary process to steal the controlling tty. */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 394 | if ((pid = fork()) < 0) { |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 395 | message(L_LOG | L_CONSOLE, "Can't fork"); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 396 | _exit(1); |
| 397 | } |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 398 | if (pid == 0) { |
| 399 | setsid(); |
| 400 | ioctl(0, TIOCSCTTY, 1); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 401 | _exit(0); |
| 402 | } |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 403 | waitfor(NULL, pid); |
| 404 | _exit(0); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 405 | } |
| 406 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 407 | /* Now fall though to actually execute things */ |
| 408 | } |
| 409 | |
| 410 | /* See if any special /bin/sh requiring characters are present */ |
| 411 | if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { |
| 412 | cmd[0] = (char*)DEFAULT_SHELL; |
| 413 | cmd[1] = (char*)"-c"; |
| 414 | cmd[2] = strcat(strcpy(buf, "exec "), a->command); |
| 415 | cmd[3] = NULL; |
| 416 | } else { |
| 417 | /* Convert command (char*) into cmd (char**, one word per string) */ |
| 418 | strcpy(buf, a->command); |
| 419 | s = buf; |
| 420 | for (tmpCmd = buf, i = 0; (tmpCmd = strsep(&s, " \t")) != NULL;) { |
| 421 | if (*tmpCmd != '\0') { |
| 422 | cmd[i] = tmpCmd; |
| 423 | i++; |
| 424 | } |
| 425 | } |
| 426 | cmd[i] = NULL; |
| 427 | } |
| 428 | |
| 429 | cmdpath = cmd[0]; |
| 430 | |
| 431 | /* |
| 432 | * Interactive shells want to see a dash in argv[0]. This |
| 433 | * typically is handled by login, argv will be setup this |
| 434 | * way if a dash appears at the front of the command path |
| 435 | * (like "-/bin/sh"). |
| 436 | */ |
| 437 | if (*cmdpath == '-') { |
| 438 | /* skip over the dash */ |
| 439 | ++cmdpath; |
| 440 | |
| 441 | /* find the last component in the command pathname */ |
| 442 | s = bb_get_last_path_component(cmdpath); |
| 443 | |
| 444 | /* make a new argv[0] */ |
| 445 | if ((cmd[0] = malloc(strlen(s) + 2)) == NULL) { |
| 446 | message(L_LOG | L_CONSOLE, bb_msg_memory_exhausted); |
| 447 | cmd[0] = cmdpath; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 448 | } else { |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 449 | cmd[0][0] = '-'; |
| 450 | strcpy(cmd[0] + 1, s); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 451 | } |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 452 | #if ENABLE_FEATURE_INIT_SCTTY |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 453 | /* Establish this process as session leader and |
| 454 | * (attempt) to make the tty (if any) a controlling tty. |
| 455 | */ |
| 456 | setsid(); |
| 457 | ioctl(0, TIOCSCTTY, 0 /*don't steal it*/); |
Paul Fox | 41a72ec | 2005-08-01 16:43:13 +0000 | [diff] [blame] | 458 | #endif |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 459 | } |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 460 | |
Eric Andersen | 1f50e84 | 2004-08-16 09:29:42 +0000 | [diff] [blame] | 461 | #if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__) |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 462 | if (a->action & ASKFIRST) { |
| 463 | static const char press_enter[] = |
| 464 | #ifdef CUSTOMIZED_BANNER |
| 465 | #include CUSTOMIZED_BANNER |
Eric Andersen | 1f50e84 | 2004-08-16 09:29:42 +0000 | [diff] [blame] | 466 | #endif |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 467 | "\nPlease press Enter to activate this console. "; |
| 468 | char c; |
| 469 | /* |
| 470 | * Save memory by not exec-ing anything large (like a shell) |
| 471 | * before the user wants it. This is critical if swap is not |
| 472 | * enabled and the system has low memory. Generally this will |
| 473 | * be run on the second virtual console, and the first will |
| 474 | * be allowed to start a shell or whatever an init script |
| 475 | * specifies. |
| 476 | */ |
| 477 | messageD(L_LOG, "waiting for enter to start '%s'" |
| 478 | "(pid %d, tty '%s')\n", |
| 479 | cmdpath, getpid(), a->terminal); |
| 480 | full_write(1, press_enter, sizeof(press_enter) - 1); |
| 481 | while (read(0, &c, 1) == 1 && c != '\n') |
| 482 | ; |
| 483 | } |
| 484 | #endif |
| 485 | /* Log the process name and args */ |
| 486 | message(L_LOG, "starting pid %d, tty '%s': '%s'", |
| 487 | getpid(), a->terminal, cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 488 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 489 | #if ENABLE_FEATURE_INIT_COREDUMPS |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 490 | { |
| 491 | struct stat sb; |
| 492 | if (stat(CORE_ENABLE_FLAG_FILE, &sb) == 0) { |
| 493 | struct rlimit limit; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 494 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 495 | limit.rlim_cur = RLIM_INFINITY; |
| 496 | limit.rlim_max = RLIM_INFINITY; |
| 497 | setrlimit(RLIMIT_CORE, &limit); |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 498 | } |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 499 | } |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 500 | #endif |
| 501 | /* Now run it. The new program will take over this PID, |
| 502 | * so nothing further in init.c should be run. */ |
| 503 | BB_EXECVP(cmdpath, cmd); |
| 504 | |
| 505 | /* We're still here? Some error happened. */ |
| 506 | message(L_LOG | L_CONSOLE, "Cannot run '%s': %s", |
| 507 | cmdpath, strerror(errno)); |
| 508 | _exit(-1); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 509 | } |
| 510 | |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 511 | static int waitfor(const struct init_action *a, pid_t pid) |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 512 | { |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 513 | int runpid; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 514 | int status, wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 515 | |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 516 | runpid = (NULL == a)? pid : run(a); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 517 | while (1) { |
Bernhard Reutner-Fischer | d818dcc | 2007-02-16 17:17:07 +0000 | [diff] [blame] | 518 | wpid = waitpid(runpid, &status, 0); |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 519 | if (wpid == runpid) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 520 | break; |
Glenn L McGrath | e6ba16f | 2003-09-26 10:45:55 +0000 | [diff] [blame] | 521 | if (wpid == -1 && errno == ECHILD) { |
| 522 | /* we missed its termination */ |
| 523 | break; |
| 524 | } |
| 525 | /* FIXME other errors should maybe trigger an error, but allow |
| 526 | * the program to continue */ |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 527 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 528 | return wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 529 | } |
| 530 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 531 | /* Run all commands of a particular type */ |
| 532 | static void run_actions(int action) |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 533 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 534 | struct init_action *a, *tmp; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 535 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 536 | for (a = init_action_list; a; a = tmp) { |
| 537 | tmp = a->next; |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 538 | if (a->action == action) { |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 539 | /* a->terminal of "" means "init's console" */ |
| 540 | if (a->terminal[0] && access(a->terminal, R_OK | W_OK)) { |
Rob Landley | 2dd4279 | 2006-03-22 17:39:13 +0000 | [diff] [blame] | 541 | delete_init_action(a); |
| 542 | } else if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) { |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 543 | waitfor(a, 0); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 544 | delete_init_action(a); |
| 545 | } else if (a->action & ONCE) { |
| 546 | run(a); |
| 547 | delete_init_action(a); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 548 | } else if (a->action & (RESPAWN | ASKFIRST)) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 549 | /* Only run stuff with pid==0. If they have |
| 550 | * a pid, that means it is still running */ |
| 551 | if (a->pid == 0) { |
| 552 | a->pid = run(a); |
| 553 | } |
| 554 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 555 | } |
| 556 | } |
| 557 | } |
| 558 | |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 559 | #if !ENABLE_DEBUG_INIT |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 560 | static void init_reboot(unsigned long magic) |
| 561 | { |
| 562 | pid_t pid; |
| 563 | /* We have to fork here, since the kernel calls do_exit(0) in |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 564 | * linux/kernel/sys.c, which can cause the machine to panic when |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 565 | * the init process is killed.... */ |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 566 | pid = vfork(); |
| 567 | if (pid == 0) { /* child */ |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 568 | reboot(magic); |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 569 | _exit(0); |
| 570 | } |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 571 | waitpid(pid, NULL, 0); |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 572 | } |
| 573 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 574 | static void shutdown_system(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 575 | { |
Eric Andersen | 813d88c | 2001-10-28 22:49:48 +0000 | [diff] [blame] | 576 | sigset_t block_signals; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 577 | |
Eric Andersen | a9cc896 | 2002-09-16 06:49:06 +0000 | [diff] [blame] | 578 | /* run everything to be run at "shutdown". This is done _prior_ |
| 579 | * to killing everything, in case people wish to use scripts to |
| 580 | * shut things down gracefully... */ |
| 581 | run_actions(SHUTDOWN); |
| 582 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 583 | /* first disable all our signals */ |
| 584 | sigemptyset(&block_signals); |
| 585 | sigaddset(&block_signals, SIGHUP); |
Mike Frysinger | a77b4f3 | 2005-04-16 08:21:34 +0000 | [diff] [blame] | 586 | sigaddset(&block_signals, SIGQUIT); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 587 | sigaddset(&block_signals, SIGCHLD); |
| 588 | sigaddset(&block_signals, SIGUSR1); |
| 589 | sigaddset(&block_signals, SIGUSR2); |
| 590 | sigaddset(&block_signals, SIGINT); |
| 591 | sigaddset(&block_signals, SIGTERM); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 592 | sigaddset(&block_signals, SIGCONT); |
| 593 | sigaddset(&block_signals, SIGSTOP); |
| 594 | sigaddset(&block_signals, SIGTSTP); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 595 | sigprocmask(SIG_BLOCK, &block_signals, NULL); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 596 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 597 | message(L_CONSOLE | L_LOG, "The system is going down NOW!"); |
| 598 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 599 | /* Allow Ctrl-Alt-Del to reboot system. */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 600 | init_reboot(RB_ENABLE_CAD); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 601 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 602 | /* Send signals to every process _except_ pid 1 */ |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 603 | message(L_CONSOLE | L_LOG, "Sending SIG%s to all processes", "TERM"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 604 | kill(-1, SIGTERM); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 605 | sync(); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 606 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 607 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 608 | message(L_CONSOLE | L_LOG, "Sending SIG%s to all processes", "KILL"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 609 | kill(-1, SIGKILL); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 610 | sync(); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 611 | sleep(1); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 612 | } |
| 613 | |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 614 | static void exec_signal(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 615 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 616 | struct init_action *a, *tmp; |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 617 | sigset_t unblock_signals; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 618 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 619 | for (a = init_action_list; a; a = tmp) { |
| 620 | tmp = a->next; |
| 621 | if (a->action & RESTART) { |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 622 | shutdown_system(); |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 623 | |
| 624 | /* unblock all signals, blocked in shutdown_system() */ |
| 625 | sigemptyset(&unblock_signals); |
| 626 | sigaddset(&unblock_signals, SIGHUP); |
Mike Frysinger | a77b4f3 | 2005-04-16 08:21:34 +0000 | [diff] [blame] | 627 | sigaddset(&unblock_signals, SIGQUIT); |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 628 | sigaddset(&unblock_signals, SIGCHLD); |
| 629 | sigaddset(&unblock_signals, SIGUSR1); |
| 630 | sigaddset(&unblock_signals, SIGUSR2); |
| 631 | sigaddset(&unblock_signals, SIGINT); |
| 632 | sigaddset(&unblock_signals, SIGTERM); |
| 633 | sigaddset(&unblock_signals, SIGCONT); |
| 634 | sigaddset(&unblock_signals, SIGSTOP); |
| 635 | sigaddset(&unblock_signals, SIGTSTP); |
| 636 | sigprocmask(SIG_UNBLOCK, &unblock_signals, NULL); |
| 637 | |
Eric Andersen | 3c8064f | 2003-07-05 08:29:01 +0000 | [diff] [blame] | 638 | /* Open the new terminal device */ |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 639 | open_stdio_to_tty(a->terminal, 0); |
Eric Andersen | 3c8064f | 2003-07-05 08:29:01 +0000 | [diff] [blame] | 640 | |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 641 | messageD(L_CONSOLE | L_LOG, "Trying to re-exec %s", a->command); |
Denis Vlasenko | 4921b54 | 2007-02-03 02:17:41 +0000 | [diff] [blame] | 642 | BB_EXECLP(a->command, a->command, NULL); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 643 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 644 | message(L_CONSOLE | L_LOG, "Cannot run '%s': %s", |
| 645 | a->command, strerror(errno)); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 646 | sleep(2); |
| 647 | init_reboot(RB_HALT_SYSTEM); |
| 648 | loop_forever(); |
| 649 | } |
| 650 | } |
| 651 | } |
| 652 | |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 653 | static void shutdown_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 654 | { |
Denis Vlasenko | e968fcd | 2007-02-03 02:42:47 +0000 | [diff] [blame] | 655 | const char *m; |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 656 | int rb; |
| 657 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 658 | shutdown_system(); |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 659 | |
Denis Vlasenko | e968fcd | 2007-02-03 02:42:47 +0000 | [diff] [blame] | 660 | m = "halt"; |
| 661 | rb = RB_HALT_SYSTEM; |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 662 | if (sig == SIGTERM) { |
| 663 | m = "reboot"; |
| 664 | rb = RB_AUTOBOOT; |
| 665 | } else if (sig == SIGUSR2) { |
| 666 | m = "poweroff"; |
| 667 | rb = RB_POWER_OFF; |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 668 | } |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 669 | message(L_CONSOLE | L_LOG, "Requesting system %s", m); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 670 | /* allow time for last message to reach serial console */ |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 671 | sleep(2); |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 672 | init_reboot(rb); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 673 | loop_forever(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 674 | } |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 675 | |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 676 | static void ctrlaltdel_signal(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 677 | { |
| 678 | run_actions(CTRLALTDEL); |
| 679 | } |
| 680 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 681 | /* The SIGSTOP & SIGTSTP handler */ |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 682 | static void stop_handler(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 683 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 684 | int saved_errno = errno; |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 685 | |
| 686 | got_cont = 0; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 687 | while (!got_cont) |
| 688 | pause(); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 689 | got_cont = 0; |
| 690 | errno = saved_errno; |
| 691 | } |
| 692 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 693 | /* The SIGCONT handler */ |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 694 | static void cont_handler(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 695 | { |
| 696 | got_cont = 1; |
| 697 | } |
| 698 | |
Denis Vlasenko | e968fcd | 2007-02-03 02:42:47 +0000 | [diff] [blame] | 699 | #endif /* !ENABLE_DEBUG_INIT */ |
Erik Andersen | de55287 | 2000-01-23 01:34:05 +0000 | [diff] [blame] | 700 | |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 701 | static void new_init_action(int action, const char *command, const char *cons) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 702 | { |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 703 | struct init_action *new_action, *a, *last; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 704 | |
"Vladimir N. Oleynik" | 6c35c7c | 2005-10-12 15:34:25 +0000 | [diff] [blame] | 705 | if (strcmp(cons, bb_dev_null) == 0 && (action & ASKFIRST)) |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 706 | return; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 707 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 708 | /* Append to the end of the list */ |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 709 | for (a = last = init_action_list; a; a = a->next) { |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 710 | /* don't enter action if it's already in the list, |
| 711 | * but do overwrite existing actions */ |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 712 | if ((strcmp(a->command, command) == 0) |
| 713 | && (strcmp(a->terminal, cons) == 0) |
| 714 | ) { |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 715 | a->action = action; |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 716 | return; |
| 717 | } |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 718 | last = a; |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 719 | } |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 720 | |
| 721 | new_action = xzalloc(sizeof(struct init_action)); |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 722 | if (last) { |
| 723 | last->next = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 724 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 725 | init_action_list = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 726 | } |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 727 | strcpy(new_action->command, command); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 728 | new_action->action = action; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 729 | strcpy(new_action->terminal, cons); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 730 | messageD(L_LOG | L_CONSOLE, "command='%s' action=%d tty='%s'\n", |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 731 | new_action->command, new_action->action, new_action->terminal); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 732 | } |
| 733 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 734 | static void delete_init_action(struct init_action *action) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 735 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 736 | struct init_action *a, *b = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 737 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 738 | for (a = init_action_list; a; b = a, a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 739 | if (a == action) { |
| 740 | if (b == NULL) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 741 | init_action_list = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 742 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 743 | b->next = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 744 | } |
| 745 | free(a); |
| 746 | break; |
| 747 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 748 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 749 | } |
| 750 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 751 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 752 | * then parse_inittab() simply adds in some default |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 753 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
| 754 | * of "askfirst" shells). If CONFIG_FEATURE_USE_INITTAB |
| 755 | * _is_ defined, but /etc/inittab is missing, this |
Erik Andersen | 812d466 | 2000-01-07 18:30:40 +0000 | [diff] [blame] | 756 | * results in the same set of default behaviors. |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 757 | */ |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 758 | static void parse_inittab(void) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 759 | { |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 760 | #if ENABLE_FEATURE_USE_INITTAB |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 761 | FILE *file; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 762 | char buf[INIT_BUFFS_SIZE], lineAsRead[INIT_BUFFS_SIZE]; |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 763 | char tmpConsole[CONSOLE_NAME_SIZE]; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 764 | char *id, *runlev, *action, *command, *eol; |
| 765 | const struct init_action_type *a = actions; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 766 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 767 | file = fopen(INITTAB, "r"); |
| 768 | if (file == NULL) { |
| 769 | /* No inittab file -- set up some default behavior */ |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 770 | #endif |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 771 | /* Reboot on Ctrl-Alt-Del */ |
Denis Vlasenko | 2f0c0d0 | 2007-01-21 00:41:04 +0000 | [diff] [blame] | 772 | new_init_action(CTRLALTDEL, "reboot", ""); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 773 | /* Umount all filesystems on halt/reboot */ |
Denis Vlasenko | 2f0c0d0 | 2007-01-21 00:41:04 +0000 | [diff] [blame] | 774 | new_init_action(SHUTDOWN, "umount -a -r", ""); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 775 | /* Swapoff on halt/reboot */ |
Bernhard Reutner-Fischer | d818dcc | 2007-02-16 17:17:07 +0000 | [diff] [blame] | 776 | if (ENABLE_SWAPONOFF) new_init_action(SHUTDOWN, "swapoff -a", ""); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 777 | /* Prepare to restart init when a HUP is received */ |
Denis Vlasenko | 2f0c0d0 | 2007-01-21 00:41:04 +0000 | [diff] [blame] | 778 | new_init_action(RESTART, "init", ""); |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame] | 779 | /* Askfirst shell on tty1-4 */ |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 780 | new_init_action(ASKFIRST, bb_default_login_shell, ""); |
| 781 | new_init_action(ASKFIRST, bb_default_login_shell, VC_2); |
| 782 | new_init_action(ASKFIRST, bb_default_login_shell, VC_3); |
| 783 | new_init_action(ASKFIRST, bb_default_login_shell, VC_4); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 784 | /* sysinit */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 785 | new_init_action(SYSINIT, INIT_SCRIPT, ""); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 786 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 787 | return; |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 788 | #if ENABLE_FEATURE_USE_INITTAB |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 789 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 790 | |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 791 | while (fgets(buf, INIT_BUFFS_SIZE, file) != NULL) { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 792 | /* Skip leading spaces */ |
| 793 | for (id = buf; *id == ' ' || *id == '\t'; id++); |
| 794 | |
| 795 | /* Skip the line if it's a comment */ |
| 796 | if (*id == '#' || *id == '\n') |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 797 | continue; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 798 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 799 | /* Trim the trailing \n */ |
Bernhard Reutner-Fischer | d818dcc | 2007-02-16 17:17:07 +0000 | [diff] [blame] | 800 | //XXX: chomp() ? |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 801 | eol = strrchr(id, '\n'); |
| 802 | if (eol != NULL) |
| 803 | *eol = '\0'; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 804 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 805 | /* Keep a copy around for posterity's sake (and error msgs) */ |
| 806 | strcpy(lineAsRead, buf); |
| 807 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 808 | /* Separate the ID field from the runlevels */ |
| 809 | runlev = strchr(id, ':'); |
| 810 | if (runlev == NULL || *(runlev + 1) == '\0') { |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 811 | message(L_LOG | L_CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 812 | continue; |
| 813 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 814 | *runlev = '\0'; |
| 815 | ++runlev; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 816 | } |
| 817 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 818 | /* Separate the runlevels from the action */ |
| 819 | action = strchr(runlev, ':'); |
| 820 | if (action == NULL || *(action + 1) == '\0') { |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 821 | message(L_LOG | L_CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 822 | continue; |
| 823 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 824 | *action = '\0'; |
| 825 | ++action; |
| 826 | } |
| 827 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 828 | /* Separate the action from the command */ |
| 829 | command = strchr(action, ':'); |
| 830 | if (command == NULL || *(command + 1) == '\0') { |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 831 | message(L_LOG | L_CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 832 | continue; |
| 833 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 834 | *command = '\0'; |
| 835 | ++command; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 836 | } |
| 837 | |
| 838 | /* Ok, now process it */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 839 | for (a = actions; a->name != 0; a++) { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 840 | if (strcmp(a->name, action) == 0) { |
| 841 | if (*id != '\0') { |
Denis Vlasenko | 51742f4 | 2007-04-12 00:32:05 +0000 | [diff] [blame] | 842 | if (strncmp(id, "/dev/", 5) == 0) |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 843 | id += 5; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 844 | strcpy(tmpConsole, "/dev/"); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 845 | safe_strncpy(tmpConsole + 5, id, |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 846 | sizeof(tmpConsole) - 5); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 847 | id = tmpConsole; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 848 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 849 | new_init_action(a->action, command, id); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 850 | break; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 851 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 852 | } |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 853 | if (a->name == 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 854 | /* Choke on an unknown action */ |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 855 | message(L_LOG | L_CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 856 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 857 | } |
Eric Andersen | d8636ca | 2002-05-15 22:19:09 +0000 | [diff] [blame] | 858 | fclose(file); |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 859 | #endif /* FEATURE_USE_INITTAB */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 860 | } |
| 861 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 862 | #if ENABLE_FEATURE_USE_INITTAB |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 863 | static void reload_signal(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 864 | { |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 865 | struct init_action *a, *tmp; |
| 866 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 867 | message(L_LOG, "reloading /etc/inittab"); |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 868 | |
| 869 | /* disable old entrys */ |
| 870 | for (a = init_action_list; a; a = a->next ) { |
| 871 | a->action = ONCE; |
| 872 | } |
| 873 | |
| 874 | parse_inittab(); |
| 875 | |
| 876 | /* remove unused entrys */ |
| 877 | for (a = init_action_list; a; a = tmp) { |
| 878 | tmp = a->next; |
Denis Vlasenko | 219d14d | 2007-03-24 15:40:16 +0000 | [diff] [blame] | 879 | if ((a->action & (ONCE | SYSINIT | WAIT)) && a->pid == 0) { |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 880 | delete_init_action(a); |
| 881 | } |
| 882 | } |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 883 | run_actions(RESPAWN); |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 884 | } |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 885 | #endif /* FEATURE_USE_INITTAB */ |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 886 | |
Denis Vlasenko | 06af216 | 2007-02-03 17:28:39 +0000 | [diff] [blame] | 887 | int init_main(int argc, char **argv); |
Rob Landley | dfba741 | 2006-03-06 20:47:33 +0000 | [diff] [blame] | 888 | int init_main(int argc, char **argv) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 889 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 890 | struct init_action *a; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 891 | pid_t wpid; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 892 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 893 | die_sleep = 30 * 24*60*60; /* if xmalloc will ever die... */ |
| 894 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 895 | if (argc > 1 && !strcmp(argv[1], "-q")) { |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 896 | return kill(1, SIGHUP); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 897 | } |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 898 | #if !ENABLE_DEBUG_INIT |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 899 | /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */ |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 900 | if (getpid() != 1 |
| 901 | && (!ENABLE_FEATURE_INITRD || !strstr(applet_name, "linuxrc")) |
| 902 | ) { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 903 | bb_show_usage(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 904 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 905 | /* Set up sig handlers -- be sure to |
| 906 | * clear all of these in run() */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 907 | signal(SIGHUP, exec_signal); |
Mike Frysinger | a77b4f3 | 2005-04-16 08:21:34 +0000 | [diff] [blame] | 908 | signal(SIGQUIT, exec_signal); |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 909 | signal(SIGUSR1, shutdown_signal); |
| 910 | signal(SIGUSR2, shutdown_signal); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 911 | signal(SIGINT, ctrlaltdel_signal); |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 912 | signal(SIGTERM, shutdown_signal); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 913 | signal(SIGCONT, cont_handler); |
| 914 | signal(SIGSTOP, stop_handler); |
| 915 | signal(SIGTSTP, stop_handler); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 916 | |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 917 | /* Turn off rebooting via CTL-ALT-DEL -- we get a |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 918 | * SIGINT on CAD so we can shut things down gracefully... */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 919 | init_reboot(RB_DISABLE_CAD); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 920 | #endif |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 921 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 922 | /* Figure out where the default console should be */ |
| 923 | console_init(); |
Denis Vlasenko | d238a47 | 2007-03-05 19:22:04 +0000 | [diff] [blame] | 924 | set_sane_term(); |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 925 | chdir("/"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 926 | setsid(); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 927 | { |
| 928 | const char * const *e; |
| 929 | /* Make sure environs is set to something sane */ |
Denis Vlasenko | bf0a201 | 2006-12-26 10:42:51 +0000 | [diff] [blame] | 930 | for (e = environment; *e; e++) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 931 | putenv((char *) *e); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 932 | } |
Rob Landley | cba1b96 | 2006-07-09 17:28:17 +0000 | [diff] [blame] | 933 | |
| 934 | if (argc > 1) setenv("RUNLEVEL", argv[1], 1); |
| 935 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 936 | /* Hello world */ |
Denis Vlasenko | ca525b4 | 2007-06-13 12:27:17 +0000 | [diff] [blame^] | 937 | message(MAYBE_CONSOLE | L_LOG, "init started: %s", bb_banner); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 938 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 939 | /* Make sure there is enough memory to do something useful. */ |
Rob Landley | c3386a4 | 2005-08-30 18:50:37 +0000 | [diff] [blame] | 940 | if (ENABLE_SWAPONOFF) { |
| 941 | struct sysinfo info; |
| 942 | |
| 943 | if (!sysinfo(&info) && |
Denis Vlasenko | dca0b70 | 2006-10-27 09:05:02 +0000 | [diff] [blame] | 944 | (info.mem_unit ? : 1) * (long long)info.totalram < 1024*1024) |
Rob Landley | c3386a4 | 2005-08-30 18:50:37 +0000 | [diff] [blame] | 945 | { |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 946 | message(L_CONSOLE, "Low memory, forcing swapon"); |
Rob Landley | c3386a4 | 2005-08-30 18:50:37 +0000 | [diff] [blame] | 947 | /* swapon -a requires /proc typically */ |
Denis Vlasenko | 2f0c0d0 | 2007-01-21 00:41:04 +0000 | [diff] [blame] | 948 | new_init_action(SYSINIT, "mount -t proc proc /proc", ""); |
Rob Landley | c3386a4 | 2005-08-30 18:50:37 +0000 | [diff] [blame] | 949 | /* Try to turn on swap */ |
Denis Vlasenko | 2f0c0d0 | 2007-01-21 00:41:04 +0000 | [diff] [blame] | 950 | new_init_action(SYSINIT, "swapon -a", ""); |
Rob Landley | c3386a4 | 2005-08-30 18:50:37 +0000 | [diff] [blame] | 951 | run_actions(SYSINIT); /* wait and removing */ |
| 952 | } |
| 953 | } |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 954 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 955 | /* Check if we are supposed to be in single user mode */ |
Denis Vlasenko | bf66fbc | 2006-12-21 13:23:14 +0000 | [diff] [blame] | 956 | if (argc > 1 |
| 957 | && (!strcmp(argv[1], "single") || !strcmp(argv[1], "-s") || LONE_CHAR(argv[1], '1')) |
| 958 | ) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 959 | /* Start a shell on console */ |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 960 | new_init_action(RESPAWN, bb_default_login_shell, ""); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 961 | } else { |
| 962 | /* Not in single user mode -- see what inittab says */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 963 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 964 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 965 | * then parse_inittab() simply adds in some default |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 966 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 967 | * of "askfirst" shells */ |
| 968 | parse_inittab(); |
Eric Andersen | d00c262 | 1999-12-07 08:37:31 +0000 | [diff] [blame] | 969 | } |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 970 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 971 | #if ENABLE_SELINUX |
Rob Landley | b3ede5a | 2006-03-27 23:09:12 +0000 | [diff] [blame] | 972 | if (getenv("SELINUX_INIT") == NULL) { |
| 973 | int enforce = 0; |
| 974 | |
| 975 | putenv("SELINUX_INIT=YES"); |
| 976 | if (selinux_init_load_policy(&enforce) == 0) { |
Denis Vlasenko | 4921b54 | 2007-02-03 02:17:41 +0000 | [diff] [blame] | 977 | BB_EXECVP(argv[0], argv); |
Rob Landley | b3ede5a | 2006-03-27 23:09:12 +0000 | [diff] [blame] | 978 | } else if (enforce > 0) { |
| 979 | /* SELinux in enforcing mode but load_policy failed */ |
| 980 | /* At this point, we probably can't open /dev/console, so log() won't work */ |
Denis Vlasenko | b716754 | 2007-02-27 19:20:00 +0000 | [diff] [blame] | 981 | message(L_CONSOLE, "Cannot load SELinux Policy. " |
| 982 | "Machine is in enforcing mode. Halting now."); |
Rob Landley | b3ede5a | 2006-03-27 23:09:12 +0000 | [diff] [blame] | 983 | exit(1); |
| 984 | } |
| 985 | } |
| 986 | #endif /* CONFIG_SELINUX */ |
| 987 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 988 | /* Make the command line just say "init" -- thats all, nothing else */ |
| 989 | fixup_argv(argc, argv, "init"); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 990 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 991 | /* Now run everything that needs to be run */ |
| 992 | |
| 993 | /* First run the sysinit command */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 994 | run_actions(SYSINIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 995 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 996 | /* Next run anything that wants to block */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 997 | run_actions(WAIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 998 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 999 | /* Next run anything to be run only once */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1000 | run_actions(ONCE); |
| 1001 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 1002 | #if ENABLE_FEATURE_USE_INITTAB |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 1003 | /* Redefine SIGHUP to reread /etc/inittab */ |
| 1004 | signal(SIGHUP, reload_signal); |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 1005 | #else |
| 1006 | signal(SIGHUP, SIG_IGN); |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 1007 | #endif /* FEATURE_USE_INITTAB */ |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 1008 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1009 | /* Now run the looping stuff for the rest of forever */ |
| 1010 | while (1) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1011 | /* run the respawn stuff */ |
| 1012 | run_actions(RESPAWN); |
| 1013 | |
| 1014 | /* run the askfirst stuff */ |
| 1015 | run_actions(ASKFIRST); |
| 1016 | |
| 1017 | /* Don't consume all CPU time -- sleep a bit */ |
| 1018 | sleep(1); |
| 1019 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1020 | /* Wait for a child process to exit */ |
Bernhard Reutner-Fischer | c58dbf2 | 2006-05-30 12:16:54 +0000 | [diff] [blame] | 1021 | wpid = wait(NULL); |
Eric Andersen | 87812dc | 2004-04-12 19:21:54 +0000 | [diff] [blame] | 1022 | while (wpid > 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1023 | /* Find out who died and clean up their corpse */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1024 | for (a = init_action_list; a; a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1025 | if (a->pid == wpid) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1026 | /* Set the pid to 0 so that the process gets |
| 1027 | * restarted by run_actions() */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1028 | a->pid = 0; |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 1029 | message(L_LOG, "process '%s' (pid %d) exited. " |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1030 | "Scheduling it for restart.", |
| 1031 | a->command, wpid); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1032 | } |
| 1033 | } |
Eric Andersen | cf1fee0 | 2002-12-17 09:48:16 +0000 | [diff] [blame] | 1034 | /* see if anyone else is waiting to be reaped */ |
Denis Vlasenko | ce97960 | 2006-09-27 23:31:08 +0000 | [diff] [blame] | 1035 | wpid = waitpid(-1, NULL, WNOHANG); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1036 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1037 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1038 | } |